SUBTERRANEAN SYSTEMS INTEGRATION
Sub-T Solutions: Mapping, Navigation, and Comms Where GPS Can’t Go
subterranean operations packages
Greenjay delivers complete subterranean operations packages—from autonomous robotic scouts and comms relay systems to real-time 3D mapping and operator training—built to perform in GPS-denied, light-degraded, and physically constrained environments.
Whether you're operating in tunnels, collapsed infrastructure, dense underground facilities, or drainage networks, our Sub-T solutions give your team the ability to see, navigate, and communicate where nothing else works.
The Subterranean Problem
Most ISR, comms, and navigation systems fail the moment you go underground.
- GPS drops instantly.
- Radio signal collapses after 10 meters.
- Line-of-sight sensors become unreliable in dust or darkness.
- Teams lose awareness, positioning, and voice coordination.
And without reliable 3D mapping, you’re moving blind into high-risk terrain.
What Greenjay Delivers
Operational Outcome
Greenjay builds self-contained Sub-T operational ecosystems—from recon and
mapping to navigation and live comms handoff above ground.
Subsystems We Provide
Autonomous Sub-T Robotics
- Tracked or legged robots (AI pathfinding, SLAM, thermal/IR, low-light cameras)
- Can breach, scout, or patrol confined environments
- Designed for concrete, earthworks, utility tunnels, or steel structures
3D Mapping & Localization
- Real-time SLAM (Simultaneous Localization and Mapping)
- Operators see live 3D layouts with AR overlays
- Stored for post-op planning or revisits
Comms Relay System
- Breadcrumb radios (drop-and-go signal repeaters)
- Mesh handoff to ground units or vehicles
- Includes mobile repeater drones for vertical shaft coverage
Surface Coordination
- Live feed integration with C2 or above-ground ATAK
- Real-time tracker for all assets in tunnels
- Feed prioritization (video, telemetry, voice)
Training Component
Sub-T is more than a system—it’s a tactic. We train your operators to navigate, recon, and communicate confidently in extreme underground conditions.
Training includes
- Sub-T robot deployment + control
- Comm node placement + mesh planning
- Tunnel entry tactics + safety
- Rapid retreat / E&E protocols
- Rapid retreat / E&E protocols
- 3D mapping interpretation + threat tagging
Use Cases Solved
- Criminal tunnel interdiction in South American urban centers
- Subway mapping & recon for civil defense
- Underground gold mine comms extension for emergency response
- Clandestine border tunnel operations for U.S. federal agencies
- Disaster zone entry mapping (earthquake rubble, flood basins)
No GPS? No light? No problem. We deliver awareness underground.
We’ve lived the complexity, fought through the gaps, and built the solutions. Now we do it for you..
Greenjay turns real-world experience into mission-ready capability. Let’s build your tactical edge.